When the output intensity of a laser is changed, a feedback control signal processed by a digital PID regulator is used to control the current of a laser tube.
利用输出光强变化，通过数字PID调节器反馈控制激光管电流可获得较为稳定的激光输出。
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Main structured items are: JDQM full face mask, air supply valve, pressure regulator valve, backboard, pressure gauge, alarming whistle, medium pressure tube, carbon fiber composite cylinder, etc.